Best way to farm gold I've found, and I tried the others from the comments:
Final Boss level, using Jim(although there may be someone better, but he gets a cash boost). Use Gauss rifle and just stand at the edge so you can hit the boss and just hold down space (or x). I think the only skill that's completely necessary is Speed reload, but Expand Mag could help marginally.
Most powerful weapons are: Bomb Cannon 4960Dps, Missile 4690Dps, Mini Missiles 4160Dps, Auto Rifle 3285Dps, Triple Shot 2538Dps. Bombs also with the Cluster Gadget are very effective, I knocked off around a third of the final bosses health with a rapid bombing.
I can get to the place in the toilet, get the 2 text messages in there, then head back up and look for the tapes but i cant see them anywhere. Looked on a walkthrough and I don't see what I'm doing wrong but still no tapes, refreshed, did it all again, still no tapes? help
I did it a bit differently to Suuljin, Beat every map with gold and got to wave 25 with 102 goblins hitting the town on the first level, Using: T HH S GGGG HH S G. T= Turtle, H= Healer, S= Shield, G= Goblin
with the chances of getting caught doing jobs, it seems right and I hardly ever get caught. But i have tried to do tasks inside prison like play cards and it seems without fail I get caught every time, after about 20 tries. Has anyone done tasks inside jail and not got caught?